Buffing wheel



\ D. F. MCGOVERN. l

BUFFlNGjWHEEl.. v

APPucATloN man nec. 15, 1920.

l Patented Allig.y 15, 1922?.

FISI INvxN-roR TTORNEY iran sTATEs ifJANInL r. MGGOVERN, or MONTPELIER, vniuvronr.

and particularly to a polishing wheel for use in buiiing or glossing granite, marble or other stone. A

In buiing Wheels as heretofore constructed, the hufiing elements are `usually segmental inserts of felt arranged concentrically about the central feed opening of the wheel in spaced relation to each other,` and the abrasive, or polishing material rmixed with water is fed to these inserts through lsaid central opening. This. structure" is open to the objection that the feed is not uniform, those inserts nearest theperiphery ofthe wheel frequently not receiving a .suflicient supply of polishing materialv while those nearest the central feed opening are possibly oversupplied. y

To the end therefore of providing a buffing wheel in which there is certainty and uniformity of feed to each indivldual insert, I have devised my invention.`

In it, the webs of the wheel spacing the inserts are provided with a plurality of feed openings through which the abrasive or polishing material mixed with water maybe introduced to the working surface, thus 1nsuring an adequate supply of polishing material to each individual felt insert. In order to assist the feed, the side walls ofthe annular feeding slots may be inclined to each other.

The construction and operation of my invention, together with a selected embodiment which well illustrates the principles involved, is disclosed in the accompanying specification and drawings throughout which like reference characters are employed. In the drawings Y Fig. I is a topplan view of a bufiing wheel in accordance with my invention, and

Fig. II is a section on the line II-II, Fi I.

lghave indicated at. 1 a biiiiing wheel of conventional type having at 2 the usual lugs by means of which the wheel may be bolted to the driver.

According to my invention the concentric webs a spacing the segmental; :fait inserts f;

Spcification f Letters atnt. atete Application filed December 15, 1920. serial No. 4395834'.

'BUFFING WHEEL. y f .-Jv

are provided with a plural-ity of slots 5.v

through which the polishing material be fed. tov the', Working surfaces ftlre indi! vidual inserts: c,

As shown in Fig. II, the side walls of the feeding slots 5 are inclined at an angle to each other as indicated at 6. The downwardly inclined surfaces 6 are advantageous I in that they insure proper feed of the p`olishing material to the felt inserts, but obviously straight sided slots may be used and I do not therefore limit vmyself to the inclined-slots.

This construction results'in a uniform and adequate feed of polishing material yto each individual insert, as distinguished from the luncertain feed from the centerV opening of the wheel which characterizes theusual buff-.i ing wheel of this class. i 4 l In practice the inserts 4 are simple strips of felt clamped edgewise between the concentric rings 3 by a plurality of wedges `7. The wedges are backed by radially disposed blocks S` which arescrewed to the under face of the wheel, as indicated at 9.y The carried by small inserts l2 which are fixed in said slots l0.. i f

Various modifications in the `construction and operation of my device may lobviously be resorted to, rall without departing vfrom the spirit of my invention if within the limits of the appended claims.

What I therefore claim and desire to secure by Letters lPatent is:

1, A buiiing wheel comprising a disc havey ing a series of spaced concentric rings *and a series of spaced concentric segmental butling elements clamped between said rings, said rings having each an annular slot series proparametrica.

blocks 8 prevent the wedges from being viding a plurality of feed openings for the introduction of polishing individual buiiing elements.

2. A buiiing `wheel comprising a disc havmaterial to the ing a series of spaced concentric rings and a series of spaced concentric segmental buiiin elements clamped between said rings` .al'i sait rings having each an annular'p'slt series providing a plurality of fecd-fienings for introduction of peliahng material to their individual buling elements and reinforcing members disposed radially or' the Working face of said disc and sub-dividing said buil ing elements into sector-shaped groups,

3. A buiing Wheel comprising a disc bain ingaseries or' spaced concentric rings and a series of spaced concentric segmental. buf'ng elementsclamped between said rings, saidv rings having each an annular slot series pro- Viding a plurality o1 feed openings 'for the introduction of polishing material to the individual buffing' elements, a plurality of radially disposed reinforcing blocks attached to the Working face oi' the disc and suo'- dividing said buiingelements into sectorshaped groups, and clamping Wedges inserted vertically between the lateral edges of said blocks and the ends of said segmental louiing elements.

ln testimony whereof l a'fiix my signature 20 in presence or' two Witnesses.

DANEL F. MCGOVERN.

1Witnesses i f REBECCA YETT, EVELYN M.A ALDEN. 

